Hello all, I have a 1977 Caprice Landau in shop with a comfortron havc system. The control head failed some time ago and someone bypassed system so blower motor did work. I have replaced control head, but programmer still from what information I can find and some testing, has a failed vacuum transducer/amplifier. I was wondering if anyone out there rebuilds the programmers or where parts can be found. Thanks for any information and assistance.